Sven Van Asbroeck 752417b3f0 rust: error: Add a helper to convert a C ERR_PTR to a Result ... Some kernel C API functions return a pointer which embeds an optional `errno`. Callers are supposed to check the returned pointer with `IS_ERR()` and if this returns `true`, retrieve the `errno` using `PTR_ERR()`. Create a Rust helper function to implement the Rust equivalent: transform a `*mut T` to `Result<*mut T>`. Lina: Imported from rust-for-linux/linux, with subsequent refactoring and contributions squashed in and attributed below. Renamed the function to from_err_ptr(). Co-developed-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Co-developed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Miguel Ojeda <ojeda@kernel.org> Co-developed-by: Fox Chen <foxhlchen@gmail.com> Signed-off-by: Fox Chen <foxhlchen@gmail.com> Co-developed-by: Gary Guo <gary@garyguo.net> Signed-off-by: Gary Guo <gary@garyguo.net> Signed-off-by: Sven Van Asbroeck <thesven73@gmail.com> Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com> Signed-off-by: Asahi Lina <lina@asahilina.net> Link: https://lore.kernel.org/r/20230224-rust-error-v3-5-03779bddc02b@asahilina.net [ Add a removal of `#[allow(dead_code)]`. ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>		2023-04-12 18:41:04 +02:00
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sync	rust: sync: arc: Add UniqueArc<MaybeUninit<T>::assume_init()	2023-04-12 18:41:04 +02:00
allocator.rs	rust: add kernel crate	2022-09-28 08:58:24 +02:00
build_assert.rs	rust: build_assert: add build_{error,assert}! macros	2022-12-04 01:59:16 +01:00
error.rs	rust: error: Add a helper to convert a C ERR_PTR to a Result	2023-04-12 18:41:04 +02:00
lib.rs	rust: Enable the new_uninit feature for kernel and driver crates	2023-04-10 05:21:15 +02:00
prelude.rs	rust: prelude: prevent doc inline of external imports	2023-01-16 23:49:46 +01:00
print.rs	rust: print: avoid evaluating arguments in pr_* macros in unsafe blocks	2023-01-16 00:54:35 +01:00
static_assert.rs	rust: static_assert: add static_assert! macro	2022-12-04 01:59:16 +01:00
std_vendor.rs	rust: std_vendor: add dbg! macro based on std's one	2022-12-04 01:59:16 +01:00
str.rs	rust: str: add fmt! macro	2022-12-04 01:59:16 +01:00
sync.rs	rust: sync: introduce UniqueArc	2023-01-16 23:48:06 +01:00
types.rs	rust: types: implement ForeignOwnable for the unit type	2023-02-01 13:24:36 +01:00